Mangrove Creek is a tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Hawkesbury River

Hawkesbury River

The Hawkesbury River, also known as Deerubbun, is one of the major rivers of the coastal region of New South Wales, Australia. The Hawkesbury River and its tributaries virtually encircle the metropolitan region of Sydney.-Geography:-Course:...

 in New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

, Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

.

Mangrove Creek rises about 5 kilometres (3.1 mi) to the south-west of Mount McQuiod. The headwaters of the creek are impounded by the Mangrove Creek Dam, which forms a major part of the water supply to the New South Wales Central Coast. Below the dam, the creek flows in a southerly direction through the settlements of Upper Mangrove

Upper Mangrove, New South Wales

Upper Mangrove is a suburb of the Central Coast region of New South Wales, Australia, located about upstream and north of Spencer along Mangrove Creek. It is part of the City of Gosford local government area....

, Mangrove Creek

Mangrove Creek, New South Wales

Mangrove Creek is a suburb of the Central Coast region of New South Wales, Australia, located about upstream and north of Spencer along the Mangrove Creek watercourse...

, Greengrove

Greengrove, New South Wales

Greengrove is a locality of and town within the Central Coast region of New South Wales, Australia, near Mangrove Mountain and adjoining the Popran National Park about west of Gosford. It is part of the City of Gosford local government area....

 and Lower Mangrove

Lower Mangrove, New South Wales

Lower Mangrove is a suburb of the Central Coast region of New South Wales, Australia, located about upstream and north of Spencer along Mangrove Creek. It is part of the City of Gosford local government area....

, before joining the Hawkesbury between Spencer

Spencer, New South Wales

Spencer is a suburb of the Central Coast region of New South Wales, Australia. It is located on the north bank of the Hawkesbury River just upstream of that rivers confluence with Mangrove Creek. Spencer is part of the City of Gosford local government area....

 and Wendoree Park

Wendoree Park, New South Wales

Wendoree Park is a suburb of the Central Coast region of New South Wales, Australia, located on the north bank of the Hawkesbury River north of Sydney. It is part of the City of Gosford local government area....

. The creek has an overall length of some 35 kilometres (21.7 mi).